@thi.ng/shader-ast-stdlib/sdf/box.js

Function collection for modular GPGPU / shader programming with @thi.ng/shader-ast

import { F, V2, V3 } from "@thi.ng/shader-ast/api/types";
import { defn, ret } from "@thi.ng/shader-ast/ast/function";
import { FLOAT0, VEC2_0, VEC3_0 } from "@thi.ng/shader-ast/ast/lit";
import { add, sub } from "@thi.ng/shader-ast/ast/ops";
import { sym } from "@thi.ng/shader-ast/ast/sym";
import { abs, length, max, min } from "@thi.ng/shader-ast/builtin/math";
import { maxComp2, maxComp3 } from "../math/maxcomp.js";
const sdfBox2 = defn(F, "sdfBox2", [V2, V2], (p, size) => {
  let d;
  return [
    d = sym(sub(abs(p), size)),
    ret(add(min(maxComp2(d), FLOAT0), length(max(d, VEC2_0))))
  ];
});
const sdfBox3 = defn(F, "sdfBox3", [V3, V3], (p, size) => {
  let d;
  return [
    d = sym(sub(abs(p), size)),
    ret(add(min(maxComp3(d), FLOAT0), length(max(d, VEC3_0))))
  ];
});
export {
  sdfBox2,
  sdfBox3
};